/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package econutri.servicos.preferencia;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.ResultSet;
import java.sql.SQLException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import lomtools.persistence.GenericDAO;

/**
 *
 * @author leoomoreira
 */
public class RemoverPreferenciaXMLServlet extends HttpServlet {
   
    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("application/xml;charset=ISO-8859-1");
        String pacienteCodigo = (request.getParameter("pacienteCodigo") == null || request.getParameter("pacienteCodigo").trim().length() == 0 ? "-1" : request.getParameter("pacienteCodigo"));
        String alimentoCodigo = (request.getParameter("alimentoCodigo") == null || request.getParameter("alimentoCodigo").trim().length() == 0 ? "-1" : request.getParameter("alimentoCodigo"));
        String xml = "";
        xml += "<result>";
        try {
            GenericDAO dao = new GenericDAO();
            if (pacienteCodigo.equalsIgnoreCase("-1") || alimentoCodigo.equalsIgnoreCase("-1")) {
                throw new SQLException();
            }
            String sql = "DELETE FROM preferencia WHERE pacientecodigo = " + pacienteCodigo + " AND alimentocodigo = " + alimentoCodigo;
            int result = dao.delete(sql);
            if (result > 0) {
                xml += "<acao>Sucesso</acao>";
            }
            else {
                xml += "<acao>Fracasso</acao>";
            }
            dao.close();
        } catch (SQLException ex) {
            xml += "<acao>Fracasso</acao>";
        }
        try {
            if (pacienteCodigo.equalsIgnoreCase("-1") || alimentoCodigo.equalsIgnoreCase("-1")) {
                throw new SQLException();
            }
            GenericDAO dao = new GenericDAO();
            String sql = "SELECT al.codigo, al.descricao, a.nivel FROM preferencia a, alimento al WHERE a.pacientecodigo = " + pacienteCodigo + " AND a.alimentocodigo = al.codigo";
            ResultSet rs = dao.executeQuery(sql);
            while (rs != null && rs.next()) {
                xml += "<item>";
                    xml += "<codigo>" + rs.getInt("codigo") + "</codigo>";
                    xml += "<descricao>" + rs.getString("descricao") + "</descricao>";
                    xml += "<nivel>" + rs.getInt("nivel") + "</nivel>";
                xml += "</item>";
            }
            dao.close();
        } catch (SQLException ex) {

        }
        xml += "</result>";
        PrintWriter out = response.getWriter();
        try {
            out.println(xml);
        } finally {
            out.close();
        }
    } 

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    } 

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
